May Weather in Lyons, United States

Last updated: June 24, 2025

In May, the average temperature in Lyons, United States hovers around 15°C (59°F). Expect a minimum of -2°C (30°F) and a maximum of 33°C (92°F) during this time. With an average precipitation amount of 116 mm (4.6 in) spread over 15 days, you can anticipate a fair bit of rain. Additionally, humidity levels are typically high, averaging around 82%.

May Temperature in Lyons

In May in Lyons, the average temperature is 15°C (59°F). Maximums can reach 33°C (92°F) and minimums can be as low as -2°C (30°F). Be prepared for a mix of warm days and chilly nights when traveling during this month.

May Weather in Lyons: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Lyons, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lyons, May typically has an average temperature of 15°C (59°F), with highs reaching up to 33°C (92°F) and lows dropping to around -2°C (30°F).

Data source: Temperature data for Lyons generated using information from the Copernicus Climate Change Service.

May Precipitation in Lyons

In Lyons in May, the total precipitation amount is 116 mm (4.6 in), occurring over a span of 15 days.

May Precipitation Trends in Lyons

The chart displays monthly precipitation patterns in Lyons, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Lyons, May typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Lyons

In Lyons in May, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

May Average Humidity in Lyons

This chart illustrates the average monthly humidity levels in Lyons, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Lyons is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Lyons

In Lyons in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Lyons.

Maximum UV Index Levels in Lyons for May

The chart shows the monthly maximum UV Index (UVI) for Lyons in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Lyons typically reaches 10, which falls under the very high exposure category.

Data source: Lyons May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Lyons Compares to Other Months

Weather in Lyons varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Lyons, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lyons, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	83 mm (3.3 inches)	90%	low
February Weather	-2°C (29°F)	83 mm (3.3 inches)	90%	moderate
March Weather	2°C (35°F)	76 mm (3.0 inches)	87%	high
April Weather	8°C (46°F)	117 mm (4.6 inches)	88%	very high
May Weather	15°C (59°F)	116 mm (4.6 inches)	82%	very high
June Weather	20°C (68°F)	86 mm (3.4 inches)	79%	very high
July Weather	23°C (73°F)	151 mm (6.0 inches)	78%	very high
August Weather	22°C (72°F)	106 mm (4.2 inches)	76%	very high
September Weather	18°C (65°F)	79 mm (3.1 inches)	78%	high
October Weather	12°C (55°F)	147 mm (5.8 inches)	84%	moderate
November Weather	4°C (40°F)	89 mm (3.5 inches)	89%	moderate
December Weather	0°C (33°F)	95 mm (3.7 inches)	86%	low